Hoisting-bucket.



C. J. RUDSTROII/I & B FL DOWNING. HOISTING BUCKET.

- APPLICATION FILED DEC-15,191?- I IBII WHI Patentedi Jan. 14:, 1919.

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rrnn STATES PATENT OFFIC UAJHLL JULIUS EIUJDSTROM AND BENJAMIN FRANKLIN DOWNING, OF EUREKA, CALIFORNIA.

HOISTING-BUGKET.

Application filed December 15, 1917.

To all whom it may concern:

Be it known that we, CARL J. Runsrnoivr and BENJAMIN F. Downinc, said CARL J. RUns'rnoM a Swede, who has taken out first naturalization papers, the last named a citizen of the United States, residing at Eureka, in the county of Humboldt, State of Cali fornia, have invented a new and useful Hoisting-Bucket, of which the following is a specification.

The subject of this invention is a hoisting bucket, and the objects of the inventors are, first, to provide a bucket consisting of a plurality of blades or sections,- second, to provide means for separating the sections, third, to provide means for closing the sections capable of holding each section firmly in a different position with respect to closed position, fourth, to provide a simple, durable and eificient bucket.

With the foregoing and other objects in view which, will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention can be made within the scope of what is claimed, without departing from the spirit of the invention.

A practical embodiment of the invention is shown in the accompanying drawing, wherein:

Figure 1 is a central longitudinal section of the device, a portion being in elevation;

Fig. 2 is a cross section on the line 2-4 of Fig. l; a

Fig. 3 is a cross section on the line 3-3 of Fig. l;

l ig. 4 is a sectional view substantially on the line H of Fig. 1.

Referring to the drawings by numerals of reference: i

ln carrying out the invention there is provided a tubular shaft 10 in which are formed longitudinal slots 11 extending from the top of the shaft to a point below the longitudinal center of the shaft.v These slots are spaced circumferentially about the shaft and, preferably, ninety degrees apart.

Extending upwardly from the bottom of the shaft 10 are other slots 11 which are positioned in vertical alinernent with the slots ii.

A formed plate 12 has upstanding radi- Specification of Letters Patent.

Patented Jan, 1d, 191%..

Serial No. act/sic.

ally disposed flanges 13 arranged in pairs and secured within the slots 11. Between each pair of flanges 13 is mounted a sheave 14:.

Lugs 15 extend outwardly from the lower end of the shaft 10 at each side of the slots 11 and these lugs are apertured to receive pins or bolts 16, which pins also pass through the flanges 1.3 and on them the sheaves lat turn.

Spaced arms 17 are arranged in pairs with their inner ends" pivotally engaged by the pins 16. The outer ends of each pair of arms merge into a downwardly curved portion 18, preferably integral with the arms 17. Secured to each portion 18, by rivets or otherwise, is a plate 19 inthe form of a tri-rectangular spherical triangle or semi lune, which combine to form a substantially hemispherical bucket.

Links 20 have their lower ends pivotally mounted between the outer ends of the arms 17 from whence they converge upwardly. The upper ends of these links are bifurcated to straddle spaced lugs 21 which extend radially of the shaft 10 from sliding blocks 22 which are mounted in the slots 11 and the longitudinal edges of which are channeled to receive the edges defining the slots ll.

Sheaves 23 are mounted between the lugs 21 and turn on pins 2% which also serve to pivot the links 20 to the lugs 21. The sliding blocks 22 are preferably provided with longitudinal apertures to permit the sheaves 23 to project therethrough.

Mounted within the shaft 10, to slide 1ongitudinally thereof, is a ring 25 formed with radially projecting lugs 26 which have a sliding ,fit in the slots 11 and upon which the blocks 22 rest. A bar 27 has its ends secured in the walls of the ring and extends across the opening to form a means for securing. the ends of cables, as will be explained. While a bar is herein shown as provided for this purpose,itis understood that various arrangements may be resorted to for this purpose. a

Seated on the upper end of the shaft 10 is a cap, comprising a tubular member 10, the diameter of which is equal to that of the shaft 10, headed at one end by a plate 28. From the head rise the spaced supports 29 between which are mounted a central guide pulley 30 and end guide pulleys 3i one on lltl each side of the central pulley. The pintles of these pulleys are journaled in the supports.

Straps 32, which are integral with the plate 28, are secured by rivets 33 or otherwise to the outer surface of the tubular member 10 and extend longitudinally of the cap. The extending ends of the straps 32 engage the upper end of the shaft 10 and are apertured to receive screws 34 which are threaded in to the shaft 10 for the purpose of binding the cap firmly in place upon the shaft.

The upper end of the shaft 10 is provided at diametrically opposite points with semi-circular notches which are adapted to aline with similar notches formed in the lower end of the tubular member 10' of the cap so as to form asupport for the end journals 35 of a shaft 36 upon which is secured the centrally disposed pulley 37.

Cables 38 have their lower ends secured to the hereinbefore mentioned rod 27 of the ring 25 and their upper ends made fast to the shaft 36 on each side of the pulley 37. A cable 39 wraps about the pulley 57, to which one end is attached", and is led therefrom. upwardly between the guide pulley 30 and one side pulley 31.

By exerting a pull on cable 39 it is unwound from the pulley 37, thereby revolving the shaft 36 and winding up the cables 38. This draws the ring 25' and With it the sliding blocks 22- upwardly thereby, through links 20, opening the bucket.

A cable 40 has its lower end secured in any suitable manner (not shown) within the lower endof the shaft 10 and extends upwardly within the shaft and out over the upper front sheave 23, by front sheave is meant the one cut away in Fig. 1. The cable then passes doWn and under the lower front sheave, 14.- and again within the shaft; then up and over the upper right hand sheave; thence down under the lower right hand sheave, then up within the column and outover the upper back sheave; then down under the lower rear sheave and up over the left hand upper sheave; thence down under the. left; hand lower sheave and then up through the shaft and out between the guide pulleys 30 and 31.

By exerting a pull on the cable 40 the bucket sections are drawn toward closed position. Because of the arrangement of this cable it is'possible; to hold these bucket sections each in a different position and yet firmly gripped against an object.

Having thus described the invention, what is claimed as new and ought by Letters Patent. is:

1'. A hoisting bucket, comprising a shaft, arms pivotally secured to the shaft, plates secured to the arms and forming a bucket, blocks slidably mounted on the shaft, links between. the blocks and arms, means for sliding the blocks to swing the arms and separate the plates, and means for sliding the blocks to close the plates.

2. A hoisting bucket, comprising a hollow shaft, said shaft provided with longitudinal slots, supports extending radially from the bottom of the shaft, sheaves turning in the supports, arms pivoted to the supports, plates secured to the arms and forming a bucket, blocks sliding in the slots,

links between the blocks and arms, means for sliding the block to separate the plates and open the bucket, and a cable passing over the sheaves and operating to slide the blocks and draw the plates toward closed position. i

3. A hoisting bucket, comprising a hollow shaft, said haft provided with longitudinal slots, supports extending radially from the lower end of the shaft, sheaves j ournaled in the supports, arms pivoted to the supports. plates secured to the arms and forming a bucket, blocks sliding in the slots, links between the blocks and arms, means for draw ing the blocks upwardly to open the bucket, and means for drawing the blocks downwardly to close the bucket.

t. A hoisting bucket, comprising a shaft, arms pivotally secured to the shaft, plates secured to the arms and formino a bucket, blocks slidably mounted on the dart, links between the blocks and arms, means for sliding the blocks to swing the arms and separate the plates, and means for sliding the blocks to close the plates whereby the plates may assume different positions with respect to closed position.

In testimony that we claim the foregoing as our own, we have hereto affixed our signatures in the presence of two witnesses.

CARL JULIUS RUDSTROM. BENJAMIN FRANKLIN DOWNING.

Witnesses:

J. M. Dew, J. F. Woonaan.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patent.

WashingtoznD. 0'. 

